9 days late

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So far my period is 9 days late. I came off my birth control in November. I have had 2 cycles the first was 43 days and the second was 41. This cycle I’m currently on cycle day 52 and still no period. I took a pregnancy test twice once on cycle day 44 (one day late) and 49 (6 days late) and both were negative. I have had some slight cramping for about 2 weeks. Just need some advice!